ICC Profiles not importing to catalog

When importing Sessions or images from Sessions to a catalog the custom ICC profiles are not copied, shows as blank in the Base Characteristics window. This is a disaster as I have tens of thousands of Sessions to import and they all have custom profiles. I've tried importing as sessions, as images and even packing the original images as EIP. All the other settings are showing but not the custom ICC profile which is simply missing. Standard C1 profiles do copy across, just not the custom profiles.